WTB Shimano Flat Mount Calipers or GRX Mechanical Shifters with Calipers

[morganb]

I was about to buy a set of GRX levers before realizing that Shimano flat mount calipers are impossible to find right now. If anyone has an extra set of pretty much any level of Shimano flat mount calipers at any level I would be interested. Ideally a set of GRX 810 shifters with brakes attached would be amazing (or even a complete 1x group) but mainly just looking for calipers for now.